123 



liairy one-half the distance from the lowest frontal bristle to the -i^^^^^^ \ 

 vibriss.B, the latter inserted slightly above the anterior edge of 

 the oral margin, facial ridges bristly on the lowest sixth ; antenna^, 

 three-fourths as long as the face, the third joint one and one-half_ . j^ 

 times as long as the second, arista pubescent, thickened on the" ^2*11 I 

 basal two-fifths, the pennltimate.joiut shorter than broad, cheeks (/\ 



almost as wide as the eye height; thorax opaque gray pollinose, 

 marked with three black vittue; wings hyaline, calypteres white; 

 length, 12 mm. Colorado; and Mesilla, K. Mex. Three female 

 specimens, captured by Carl F. Baker and T. D. A. Cockerell. 

 Type No. 8581, U. S. National Museum oi^am n. sp. 



Genus PARACH^TA, new genus. 



The principal characters of this genus have been given in the table 

 of genera published on previous pages. The type species is black, 

 the first two joints of antennte, palpi, hind corners of thorax, and the 

 scutellum yellow ; sides of first three segments of abdomen sometimes 

 tinged with yellowish; front of male one-half as wide as either eye, 

 destitute of orbital bristles, frontal bristles descending to base of 

 third antennal joint, cheeks one-fourth as wide as the eye height, 

 vibrissre inserted one-third/tlie length of the second antennal joint 

 above the anterior edge of the oral margin, facial ridges bristly on the 

 lower two-thmls to three-fourths; anteuniie four-fifths as long as the 

 face, the thlrd joint one-third as long as the «^©oml, arista thickened 

 on the basal half, the penultimate joint scarcely longer than broad; 

 thorax thinly gray pollinose, marked with four black vitt*, four 

 postsutural and three sternopleural macrochteta', scutellum bearing 

 four pairs of long marginal; abdomen shining, destitute of pollen, no. 

 macrochaitte on the fi rst two segments , only a marginal row on the 

 third; hind tibiai densely ciliate with scale-like bristles; wings hyaline, 

 the bases brownish, calypteres brown; length, 13 mm. Ithaca and 

 New York, N. Y. (Bfptey^H-Exoti^u e s , - ^ ii-) i>lomont . 1; p i 150; 1646 : 

 ^lepharip0,ra, - Blepliari'peza inermis Bigot, Annales Soc. Ent. France, 

 p. 91 ; 1888.) /-V». e.r >*>j^ Bi'f ■ hicolor Maoq. 



Genus BLEPHARIPEZA Macq. 



Blepharipeca Macqnart, Dipteres Exotiques, Vol. II, Part IIJp. 211(54); 1843. 

 liileya Brauer aud Bergenstamm, Zweif. Kais. Miis. Wien, VI, p. 444-; 1893. (Xon 



Ashniead, Eutomologica Americana, Vol. IV, p. 42 ; .June, 1888. ^Non Howard, 



loc. cit., p. 80; .Inly, 1888.) 

 Bileymyia Townsend, Entomological News, Vol. IV, p. 277; October, 1893. 



The latter name was proposed to take the place of Kileya, which is 

 preoccupied in the Hymenoptera. A comparison of sijccimens of Rilei/a 

 aniericana (the type species of this genus), identified by Brauer and 

 Bergenstamm, with specimens of Blepharipeza leueophrys (the type 

 species of the latter genus), fails to disclose any difference of generic 



